Q: What is the sum of all factors of the number 133,721 excluding 133,721?

 A: 21,889

Why is 21,889 the sum of all factors of 133,721, excluding 133,721?

The factors of the number 133,721 are: 1, 7, 49, 2729, 19103, 133721.

If you add them up, you will get the total of 133,742. Now subtract 133,721 to get 21,889


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